INFORMATION TECHNOLOGY COMPUTER HARDWARE

6 elements of communication computer system Human being Hardware Software Data / information Procedure Communication

What is hardware? Hardware is best described as a device that is physically connected to your computer or something that can be physically touched. A CD-ROM, monitor, and printer are all examples of computer hardware.

Without any hardware your computer would not exist and software would have nothing to run on.

5 main function of hardware Input Processing Output Storage Communication

INPUT TYPES OF HARDWARE OUTPUT

Input Device Input device is a tool to interpret the symbol that understand by human being to the symbol that computer understand to process. Device for entering information into a computer.

INPUT DEVICE Keyboard entry Direct entry

Keyboard Entry Function key Numeric key Escape key Data will be input into the computer using the keyboard Windows key Cursor key Space bar key

Direct Entry Device This device is to create data that can be read by machine and direct enter to the CPU. Direct entry device is divide to pointing, scanner and voice input device

Direct entry device Pointing Devices Mouse Trackball Touch screen Digital camera

Direct entry device Example: Digitizer Joystick Game Controller Gamepad

Direct entry device Scanner Devices Scan text, image, drawing or special symbol Images are recorded in digital form.

Scanner Image scanner Bar code reader Fax machine Character recognition

Voice Input Device This device is change the human voice into digital code. Example : microphone

OUTPUT DEVICE Output device is a tool to interpret the code that understand by computer to the symbol or language that understand by human being. Device for appearing an information from computer.

Output Device Output Devices are divided by 4 : Monitor Printer Plotter Voice output device

Types of monitor CRT – cathode ray tube LCD – Liquid crystal display monitor

Printer Printer is a tools for transferring information onto paper, that is truly external to the other functions of the computer.

Printer 4 types of printer : Ink jet Dote matrix Thermal Laser jet

Plotter Plotter is a special device to create chart, map, 3D illustration and architectural drawing Plotter is divide by 4 : Pen plotter Electrostatic plotter Ink jet plotter Direct image plotter

Voice Output Device This device is function to outward the sound.